PROCESS FOR PRODUCING CROSSLINKED ETHYLENE-BASED RESIN PIPE

PROBLEM TO BE SOLVED: To provide a process for producing a crosslinked ethylene-based resin pipe capable of producing the crosslinked ethylene-based resin pipe not only having stable quality by suppressing thermal degradation of a resin but also excellent in bending processability, and also excellen...

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Bibliographische Detailangaben
Hauptverfasser:	TAKASAKI HIDETO, NAGASE SADAO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a process for producing a crosslinked ethylene-based resin pipe capable of producing the crosslinked ethylene-based resin pipe not only having stable quality by suppressing thermal degradation of a resin but also excellent in bending processability, and also excellent in creep resistance by using a water crosslinking method of a silane-modified ethylene-based resin. SOLUTION: The process for producing the crosslinked ethylene-based resin pipe comprises the steps of adding at least an ethylene resin-based powder having density of 0.935 g/cm3or lower, an ethylenic unsaturated silane compound and a radical generator to an ethylene-based resin pellet having density of 0.940 g/cm3or higher to mix, then supplying this to a hopper of an extruder to melt and knead, modifying the ethylene-based resin with an ethylenic unsaturated silane compoud, subjecting to melt extrusion molding to form into a pipe shape, and next bringing into contact with water under the presence of a silanol condensation catalyst to crosslink the modified etylene-based resin. COPYRIGHT: (C)2005,JPO&NCIPI